Inital Release: OTP 22.0
Git Tag: OTP-22.0
Date: 2019-04-24
Trouble Report Id: OTP-13397, OTP-13726, OTP-14282, OTP-14461,
OTP-14625, OTP-14703, OTP-14724, OTP-14731,
OTP-14732, OTP-14737, OTP-14746, OTP-14792,
OTP-14831, OTP-14865, OTP-14894, OTP-14984,
OTP-15011, OTP-15055, OTP-15063, OTP-15075,
OTP-15095, OTP-15111, OTP-15128, OTP-15129,
OTP-15195, OTP-15200, OTP-15211, OTP-15220,
OTP-15238, OTP-15261, OTP-15262, OTP-15273,
OTP-15336, OTP-15340, OTP-15349, OTP-15351,
OTP-15362, OTP-15381, OTP-15385, OTP-15386,
OTP-15427, OTP-15439, OTP-15452, OTP-15456,
OTP-15491, OTP-15513, OTP-15534, OTP-15535,
OTP-15543, OTP-15550, OTP-15564, OTP-15571,
OTP-15575, OTP-15581, OTP-15588, OTP-15591,
OTP-15596, OTP-15607, OTP-15610, OTP-15611,
OTP-15612, OTP-15613, OTP-15615, OTP-15617,
OTP-15621, OTP-15622, OTP-15623, OTP-15626,
OTP-15631, OTP-15632, OTP-15633, OTP-15635,
OTP-15640, OTP-15644, OTP-15649, OTP-15655,
OTP-15668, OTP-15672, OTP-15673, OTP-15674,
OTP-15677, OTP-15678, OTP-15680, OTP-15683,
OTP-15687, OTP-15689, OTP-15691, OTP-15692,
OTP-15693, OTP-15694, OTP-15697, OTP-15698,
OTP-15699, OTP-15703, OTP-15707, OTP-15708,
OTP-15710, OTP-15712, OTP-15715, OTP-15717,
OTP-15740, OTP-15746, OTP-15749, OTP-15751,
OTP-15752, OTP-15754, OTP-15755, OTP-15756,
OTP-15758, OTP-15760, OTP-15761, OTP-15770,
OTP-15771, OTP-15773, OTP-15774, OTP-15775,
OTP-15776
Seq num: ERIERL-143, ERIERL-280, ERIERL-324,
ERIERL-333, ERIERL-334, ERIERL-342, ERL-556,
ERL-639, ERL-714, ERL-749, ERL-773, ERL-863,
ERL-864, ERL-878, ERL-893, ERL-904, ERL-907
System: OTP
Release: 22
Application: asn1-5.0.9, common_test-1.18, compiler-7.4,
crypto-4.5, debugger-4.2.7, dialyzer-3.4,
edoc-0.11, eldap-1.2.7, erl_docgen-0.9.1,
erl_interface-3.12, erts-10.4, hipe-3.19,
inets-7.0.8, jinterface-1.10, kernel-6.4,
megaco-3.18.5, mnesia-4.16, observer-2.9.1,
odbc-2.12.4, os_mon-2.5, public_key-1.6.6,
reltool-0.8, runtime_tools-1.13.3, sasl-3.4,
snmp-5.3, ssh-4.7.6, ssl-9.3, stdlib-3.9,
syntax_tools-2.2, tools-3.2, wx-1.8.8,
xmerl-1.3.21
Predecessor: OTP
Check out the git tag OTP-22.0, and build a full OTP system including
documentation.
---------------------------------------------------------------------
--- HIGHLIGHTS ------------------------------------------------------
---------------------------------------------------------------------
OTP-13397 Application(s): erts
Add support for Erlang Distribution protocol to split
the payload of large signals into several fragments.
This allows other processes to communicate
uninterrupted during the transmission of these signals.
OTP-14831 Application(s): erts, kernel
A simple socket API is provided through the socket
module. This is a low level API that does *not* replace
gen_[tcp|udp|sctp]. It is intended to *eventually*
replace the inet driver, but not the high level
gen-modules (gen_tcp, gen_udp and gen_sctp). It also
provides a basic API that facilitates the
implementation of other protocols, than TCP, UDP and
SCTP.
Known issues are; No support for the Windows OS
(currently).
OTP-14894 Application(s): compiler
Related Id(s): ERL-714
The compiler has been rewritten to internally use an
intermediate representation based on Static Single
Assignment (SSA). The new intermediate representation
makes more optimizations possible.
Most noticeable is that the binary matching
optimizations are now applicable in many more
circumstances than before.
Another noticeable change is that type optimizations
are now applied across local function calls, and will
remove a lot more redundant type tests than before.
OTP-15055 Application(s): ssl
Use new logger API in ssl. Introduce log levels and
verbose debug logging for SSL.
OTP-15128 Application(s): erts, stdlib
ETS option write_concurrency now also affects and
improves the scalability of ordered_set tables. The
implementation is based on a data structure called
contention adapting search tree, where the lock
granularity adapts to the actual amount of concurrency
exploited by the applications in runtime.
OTP-15439 Application(s): erts
The length/1 BIF used to calculate the length of the
list in one go without yielding, even if the list was
very long. In OTP 22, length/1 will yield when called
with a long lists.
OTP-15456 Application(s): compiler
All compiler options that can be given in the source
file can now also be given in the option list or from
the command line for erlc.
Specifically, the option
{nowarn_deprecated_function,MFAs} was only recognized
when given in the file with the attribute -compile().
The option {nowarn_unused_function,FAs} was incorrectly
documented to only work in a file, but it also worked
when given in the option list.
OTP-15575 Application(s): tools
The cover tool now uses the counters module instead of
ets for updating the counters for how many times a line
has been executed. By default, Cover will work with
distributed nodes, but a new function
cover:local_only/0 allows running the Cover in a
restricted but faster local-only mode.
The increase in speed will vary depending on the type
of code being cover-compiled, but as an example, the
compiler test suite runs more than twice as fast with
the new Cover.
OTP-15591 Application(s): ssl
Basic support for TLS 1.3 Server for experimental use.
The client is not yet functional, for more information
see the Standards Compliance chapter of the User's
Guide.
OTP-15596 Application(s): erts, hipe, otp
In OTP 22, HiPE (the native code compiler) is not fully
functional. The reasons for this are:
There are new BEAM instructions for binary matching
that the HiPE native code compiler does not support.
The new optimizations in the Erlang compiler create new
combination of instructions that HiPE currently does
not handle correctly.
If erlc is invoked with the +native option, and if any
of the new binary matching instructions are used, the
compiler will issue a warning and produce a BEAM file
without native code.
OTP-15640 Application(s): erts
Added the NIF function enif_term_type, which helps
avoid long sequences of enif_is_xyz by returning the
type of the given term. This is especially helpful for
NIFs that serialize terms, such as JSON encoders, where
it can improve both performance and readability.
OTP-15655 Application(s): crypto
Related Id(s): ERL-864, PR-2173, PR-2186
The new hash_info/1 and cipher_info/1 functions returns
maps with information about the hash or cipher in the
argument.
OTP-15691 Application(s): snmp
Related Id(s): ERIERL-324
[snmp|agent] Add a get-mechanism callback module (and a
corresponding behaviour). The agent calls this module
to handle each get (get, get-next and get-bulk)
request.
OTP-15715 Application(s): compiler, erts
Internal documentation has now been added to the *Erts*
and *Compiler* applications.
The internal documents for *Erts* describe
miscellaneous interesting implementation details. Those
details can change at any time.
The internal documentation for *Compiler* documents the
API for the Core Erlang modules. While we will not
change those APIs without good reason, we don't give
the same guarantees about backward compatibility as for
the rest of the APIs in OTP.
---------------------------------------------------------------------
--- POTENTIAL INCOMPATIBILITIES -------------------------------------
---------------------------------------------------------------------
OTP-14865 Application(s): ssl
TLS-1.0, TLS-1.1 and DTLS-1.0 are now considered legacy
and not supported by default
OTP-15381 Application(s): stdlib
The gen_* behaviours have been changed so that if
logging of the last N messages through sys:log/2,3 is
active for the server, this log is included in the
terminate report.
To accomplish this the format of "System Events" as
defined in the man page for sys has been clarified and
cleaned up, a new function sys:get_log/1 has been
added, and sys:get_debug/3 has been deprecated. Due to
these changes, code that relies on the internal badly
documented format of "System Events", need to be
corrected.
OTP-15571 Application(s): reltool
A new element, Opts, can now be included in a rel tuple
in the reltool release specific configuration format:
{rel, Name, Vsn, RelApps, Opts}.
This supports the use of {rel, Name, Vsn, RelApps,
[{load_dot_erlang, false}]} to prevent the boot script
from running the .erlang file.
The incompatibilities are as follows:
* The return from reltool:get_config/1 and
reltool:get_config/3 includes the new rel tuple for all
rels where the load_dot_erlang option is set to false.
* The return from reltool:get_config/3 includes the new
rel tuple for ALL rels if the InclDefs parameter is set
to true.
OTP-15621 Application(s): erl_interface, otp
The limited support for VxWorks is deprecated as of OTP
22, and will be removed in OTP 23.
OTP-15622 Application(s): erl_interface
The old legacy erl_interface library (functions with
prefix erl_) is deprecated as of OTP 22, and will be
removed in OTP 23. This does not apply to the ei
library. Reasonably new gcc compilers will issue
deprecation warnings. In order to disable these
warnings, define the macro EI_NO_DEPR_WARN.
OTP-15644 Application(s): crypto
Related Id(s): OTP-14732, OTP-15451, PR-1857, PR-2068,
PR-2095
A new API is implemented in crypto. See the CRYPTO
user's guide, chapter New and Old API for more
information.
The old api with the crypto:block_* and crypto:stream_*
interfaces is kept for compatibility, but implemented
with the new api. Please note that since the error
checking is more thorough, there might be arguments
with for example faulty lengths that are no longer
accepted.
OTP-15677 Application(s): crypto
Fixed a bug in error return for crypto:poly1305/2. It
returned the atom notsup instead of the exception
notsup.
OTP-15678 Application(s): crypto
The cipher chacha20 was introduced in OpenSSL 1.1.0.
However, it could in a very odd situation, fail for
versions less than OpenSSL 1.1.0d. It is therefore
disabled for those versions.
OTP-15692 Application(s): kernel
Related Id(s): PR-2170
In OTP-21.3, a warning was introduced for duplicated
applications/keys in configuration. This warning would
be displayed both when the configuration was given as a
file on system start, and during runtime via
application:set_env/1,2.
The warning is now changed to a badarg exception in
application:set_env/1,2. If the faulty configuration is
given in a configuration file on system start, the
startup will fail.
OTP-15712 Application(s): erl_interface
Related Id(s): OTP-15774
Added support to receive, decode, encode and send both
bit strings and export funs (fun M:F/A).
New functions ei_decode_bitstring and
ei_encode_bitstring have been added in order to decode
and encode bit strings where number of bits is not
necessary divisible by 8 (a whole number of bytes). The
existing functions ei_decode_fun and ei_encode_fun can
now also handle export funs.
Before this change, bit strings and export funs sent to
an erl_interface c-node were encoded using an
undocumented fallback tuple format. For bit strings
{Binary,BitsInLastByte} and for export funs {M,F}.
Existing c-node implementations expecting these tuples
must be changed to instead use ei_decode_bitstring and
ei_decode_fun. As a temporary solution you can also
build erl_interface with macro EI_COMPAT=21 or call
ei_set_compat_rel(21) to receive the old fallback
tuples.
OTP-15717 Application(s): common_test
Related Id(s): ERIERL-334
The test result when a hook function fails is in
general the same as if the function that the hook is
associated with fails. For example, if
post_init_per_testcase fails the result is that the
test case is skipped, as is the case when
init_per_testcase fails.This, however, was earlier not
true for timetrap timeouts or other error situations
where the process running the hook function was killed.
This is now corrected, so the error handling should be
the same no matter how the hook function fails.
OTP-15774 Application(s): jinterface
Related Id(s): OTP-15712
Added support to receive export funs (fun M:F/A).
Before this change, export funs sent to a jinterface
node were encoded using an undocumented fallback tuple
format {M,F}. Existing jinterface implementations
expecting these tuples must be changed to instead use
the existing OtpErlangExternalFun class.
---------------------------------------------------------------------
--- OTP-22.0 --------------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14282 Application(s): asn1, common_test, debugger, dialyzer,
erl_docgen, inets, jinterface, observer, otp,
syntax_tools, wx
Related Id(s): PR-1891
All incorrect (that is, all) uses of "can not" has been
corrected to "cannot" in source code comments,
documentation, examples, and so on.
--- Improvements and New Features ---
OTP-14625 Application(s): otp
Configure scripts in different OTP applications are now
executed in parallel during build of OTP.
OTP-15220 Application(s): otp
Documented how atoms are ordered in reference manual.
OTP-15596 Application(s): erts, hipe, otp
*** HIGHLIGHT ***
In OTP 22, HiPE (the native code compiler) is not fully
functional. The reasons for this are:
There are new BEAM instructions for binary matching
that the HiPE native code compiler does not support.
The new optimizations in the Erlang compiler create new
combination of instructions that HiPE currently does
not handle correctly.
If erlc is invoked with the +native option, and if any
of the new binary matching instructions are used, the
compiler will issue a warning and produce a BEAM file
without native code.
OTP-15621 Application(s): erl_interface, otp
*** POTENTIAL INCOMPATIBILITY ***
The limited support for VxWorks is deprecated as of OTP
22, and will be removed in OTP 23.
---------------------------------------------------------------------
--- asn1-5.0.9 ------------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14282 Application(s): asn1, common_test, debugger, dialyzer,
erl_docgen, inets, jinterface, observer, otp,
syntax_tools, wx
Related Id(s): PR-1891
All incorrect (that is, all) uses of "can not" has been
corrected to "cannot" in source code comments,
documentation, examples, and so on.
OTP-15697 Application(s): asn1
Related Id(s): PR-2159
Corrected problems with the following value
definitions:
-- value of SEQUENCE OF CHOICE with extensions
-- value of CHOICE with extensions
-- DEFAULT used with OCTET STRING
Full runtime dependencies of asn1-5.0.9: erts-7.0, kernel-3.0,
stdlib-2.0
---------------------------------------------------------------------
--- common_test-1.18 ------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14282 Application(s): asn1, common_test, debugger, dialyzer,
erl_docgen, inets, jinterface, observer, otp,
syntax_tools, wx
Related Id(s): PR-1891
All incorrect (that is, all) uses of "can not" has been
corrected to "cannot" in source code comments,
documentation, examples, and so on.
OTP-15717 Application(s): common_test
Related Id(s): ERIERL-334
*** POTENTIAL INCOMPATIBILITY ***
The test result when a hook function fails is in
general the same as if the function that the hook is
associated with fails. For example, if
post_init_per_testcase fails the result is that the
test case is skipped, as is the case when
init_per_testcase fails.This, however, was earlier not
true for timetrap timeouts or other error situations
where the process running the hook function was killed.
This is now corrected, so the error handling should be
the same no matter how the hook function fails.
OTP-15758 Application(s): common_test
Related Id(s): ERIERL-342
In some rare cases, when two common_test nodes used the
same log directory, a timing problem could occur which
caused common_test to crash because it's log cache file
was unexpectedly empty. This is now corrected.
--- Improvements and New Features ---
OTP-14746 Application(s): common_test
Related Id(s): ERIERL-143
Two new common_test hook functions are introduced:
post_groups/2, which is called after Suite:groups/0
post_all/3, which is called after Suite:all/0
These functions allow modifying the return values from
the groups/0 and all/0 functions, respectively.
A new term, {testcase,TestCase,RepeatProperties} is now
also allowed in the return from all/0. This can be used
for repeating a single test case a specific number of
times, or until it fails or succeeds once.
OTP-15633 Application(s): common_test, stdlib
Related Id(s): PR-1787
Use ssh instead of rsh as the default remote shell.
Full runtime dependencies of common_test-1.18: compiler-6.0,
crypto-3.6, debugger-4.1, erts-7.0, ftp-1.0.0, inets-6.0, kernel-4.0,
observer-2.1, runtime_tools-1.8.16, sasl-2.4.2, snmp-5.1.2, ssh-4.0,
stdlib-3.5, syntax_tools-1.7, tools-2.8, xmerl-1.3.8
---------------------------------------------------------------------
--- compiler-7.4 ----------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-15760 Application(s): compiler, stdlib
Related Id(s): ERL-907
record_info/2 is a pseudo-function that requires
literal arguments known at compile time. Therefore, the
following usage is illegal: fun record/info/2. The
compiler would crash when during compilation of that
kind of code. Corrected to issue a compilation error.
--- Improvements and New Features ---
OTP-14894 Application(s): compiler
Related Id(s): ERL-714
*** HIGHLIGHT ***
The compiler has been rewritten to internally use an
intermediate representation based on Static Single
Assignment (SSA). The new intermediate representation
makes more optimizations possible.
Most noticeable is that the binary matching
optimizations are now applicable in many more
circumstances than before.
Another noticeable change is that type optimizations
are now applied across local function calls, and will
remove a lot more redundant type tests than before.
OTP-15273 Application(s): compiler
Related Id(s): ERL-639
Funs are no longer created when they are only used
locally, greatly improving the performance of named
funs and "fun-wrapped" macros.
OTP-15456 Application(s): compiler
*** HIGHLIGHT ***
All compiler options that can be given in the source
file can now also be given in the option list or from
the command line for erlc.
Specifically, the option
{nowarn_deprecated_function,MFAs} was only recognized
when given in the file with the attribute -compile().
The option {nowarn_unused_function,FAs} was incorrectly
documented to only work in a file, but it also worked
when given in the option list.
OTP-15715 Application(s): compiler, erts
*** HIGHLIGHT ***
Internal documentation has now been added to the *Erts*
and *Compiler* applications.
The internal documents for *Erts* describe
miscellaneous interesting implementation details. Those
details can change at any time.
The internal documentation for *Compiler* documents the
API for the Core Erlang modules. While we will not
change those APIs without good reason, we don't give
the same guarantees about backward compatibility as for
the rest of the APIs in OTP.
OTP-15749 Application(s): compiler, stdlib
Related Id(s): ERL-904
There are new compiler options nowarn_removed and
{nowarn_removed,Items} to suppress warnings for
functions and modules that have been removed from OTP.
Full runtime dependencies of compiler-7.4: crypto-3.6, erts-9.0,
hipe-3.12, kernel-4.0, stdlib-2.5
---------------------------------------------------------------------
--- crypto-4.5 ------------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-15677 Application(s): crypto
*** POTENTIAL INCOMPATIBILITY ***
Fixed a bug in error return for crypto:poly1305/2. It
returned the atom notsup instead of the exception
notsup.
OTP-15678 Application(s): crypto
*** POTENTIAL INCOMPATIBILITY ***
The cipher chacha20 was introduced in OpenSSL 1.1.0.
However, it could in a very odd situation, fail for
versions less than OpenSSL 1.1.0d. It is therefore
disabled for those versions.
--- Improvements and New Features ---
OTP-14461 Application(s): crypto, stdlib
Related Id(s): PR-1857
A new rand module algorithm, exro928ss
(Xoroshiro928**), has been implemented. It has got a
really long period and good statistical quality for all
output bits, while still being only about 50% slower
than the default algorithm.
The same generator is also used as a long period
counter in a new crypto plugin for the rand module,
algorithm crypto_aes. This plugin uses AES-256 to
scramble the counter which buries any detectable
statistical artifacts. Scrambling is done in chunks
which are cached to get good amortized speed (about
half of the default algorithm).
OTP-14732 Application(s): crypto
Related Id(s): PR-2068, PR-2095
Crypto's single C-file is splitted into multiple files.
The different coding styles in the different parts are
unified into a single style.
OTP-15129 Application(s): crypto, erts
Build configuration of the crypto application has been
moved from the erts application into the crypto
application.
OTP-15564 Application(s): crypto
Related Id(s): PR-2129
Adds two hash functions blake2b and blake2s (64 bit
hash and 32 bit hash respectively). These are modern
and standard hash functions used in blockchains and
encrypted communication protocols. The hash functions
are available in OpenSSL since version 1.1.1.
OTP-15644 Application(s): crypto
Related Id(s): OTP-14732, OTP-15451, PR-1857, PR-2068,
PR-2095
*** POTENTIAL INCOMPATIBILITY ***
A new API is implemented in crypto. See the CRYPTO
user's guide, chapter New and Old API for more
information.
The old api with the crypto:block_* and crypto:stream_*
interfaces is kept for compatibility, but implemented
with the new api. Please note that since the error
checking is more thorough, there might be arguments
with for example faulty lengths that are no longer
accepted.
OTP-15655 Application(s): crypto
Related Id(s): ERL-864, PR-2173, PR-2186
*** HIGHLIGHT ***
The new hash_info/1 and cipher_info/1 functions returns
maps with information about the hash or cipher in the
argument.
OTP-15683 Application(s): crypto
Obey additional OpenSSL configure flags when compiling
the C-part of the CRYPTO application: no-bf, no-blake2,
no-chacha, no-cmac, no-dh, no-dsa, no-md4, no-poly1305,
no-rc2, no-rc4 and no-rmd160.
OTP-15771 Application(s): crypto
A new function crypto:supports/1 is introduced. The
single argument takes an atom as argument: hashs,
public_keys, ciphers, macs, curves or rsa_opts. The
return value is a list of supported algorithms.
The difference with the existing crypto:supports/0 is,
apart from the argument and the return value, that the
old function reports what is supported by the old api,
and the new function reports algorithms in the new api.
Full runtime dependencies of crypto-4.5: erts-9.0, kernel-5.3,
stdlib-3.4
---------------------------------------------------------------------
--- debugger-4.2.7 --------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14282 Application(s): asn1, common_test, debugger, dialyzer,
erl_docgen, inets, jinterface, observer, otp,
syntax_tools, wx
Related Id(s): PR-1891
All incorrect (that is, all) uses of "can not" has been
corrected to "cannot" in source code comments,
documentation, examples, and so on.
Full runtime dependencies of debugger-4.2.7: compiler-5.0, erts-9.0,
kernel-5.3, stdlib-3.4, wx-1.2
---------------------------------------------------------------------
--- dialyzer-3.4 ----------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14282 Application(s): asn1, common_test, debugger, dialyzer,
erl_docgen, inets, jinterface, observer, otp,
syntax_tools, wx
Related Id(s): PR-1891
All incorrect (that is, all) uses of "can not" has been
corrected to "cannot" in source code comments,
documentation, examples, and so on.
--- Improvements and New Features ---
OTP-15752 Application(s): dialyzer
Use bit syntax in warnings instead of Core Erlang
syntax, for readability.
Full runtime dependencies of dialyzer-3.4: compiler-7.0, erts-9.0,
hipe-3.16.1, kernel-5.3, stdlib-3.4, syntax_tools-2.0, wx-1.2
---------------------------------------------------------------------
--- edoc-0.11 -------------------------------------------------------
---------------------------------------------------------------------
--- Improvements and New Features ---
OTP-15761 Application(s): edoc, syntax_tools
Correct links in the documentation.
Full runtime dependencies of edoc-0.11: erts-6.0, inets-5.10,
kernel-3.0, stdlib-2.5, syntax_tools-1.6.14, xmerl-1.3.7
---------------------------------------------------------------------
--- eldap-1.2.7 -----------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-15632 Application(s): eldap
Typo fix
OTP-15775 Application(s): eldap
Fix dialyzer warnings in eldap when not matching the
return value of ssl:close/1.
Full runtime dependencies of eldap-1.2.7: asn1-3.0, erts-6.0,
kernel-3.0, ssl-5.3.4, stdlib-2.0
---------------------------------------------------------------------
--- erl_docgen-0.9.1 ------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14282 Application(s): asn1, common_test, debugger, dialyzer,
erl_docgen, inets, jinterface, observer, otp,
syntax_tools, wx
Related Id(s): PR-1891
All incorrect (that is, all) uses of "can not" has been
corrected to "cannot" in source code comments,
documentation, examples, and so on.
Full runtime dependencies of erl_docgen-0.9.1: edoc-0.7.13, erts-9.0,
stdlib-3.4, xmerl-1.3.7
---------------------------------------------------------------------
--- erl_interface-3.12 ----------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-15773 Application(s): erl_interface, erts
The vxworks configure has been updated to respect the
environment CFLAGS.
--- Improvements and New Features ---
OTP-15340 Application(s): erl_interface, erts, megaco, odbc
Related Id(s): OTP-14625
Minor adjustments made to build system for parallel
configure.
OTP-15621 Application(s): erl_interface, otp
*** POTENTIAL INCOMPATIBILITY ***
The limited support for VxWorks is deprecated as of OTP
22, and will be removed in OTP 23.
OTP-15622 Application(s): erl_interface
*** POTENTIAL INCOMPATIBILITY ***
The old legacy erl_interface library (functions with
prefix erl_) is deprecated as of OTP 22, and will be
removed in OTP 23. This does not apply to the ei
library. Reasonably new gcc compilers will issue
deprecation warnings. In order to disable these
warnings, define the macro EI_NO_DEPR_WARN.
OTP-15712 Application(s): erl_interface
Related Id(s): OTP-15774
*** POTENTIAL INCOMPATIBILITY ***
Added support to receive, decode, encode and send both
bit strings and export funs (fun M:F/A).
New functions ei_decode_bitstring and
ei_encode_bitstring have been added in order to decode
and encode bit strings where number of bits is not
necessary divisible by 8 (a whole number of bytes). The
existing functions ei_decode_fun and ei_encode_fun can
now also handle export funs.
Before this change, bit strings and export funs sent to
an erl_interface c-node were encoded using an
undocumented fallback tuple format. For bit strings
{Binary,BitsInLastByte} and for export funs {M,F}.
Existing c-node implementations expecting these tuples
must be changed to instead use ei_decode_bitstring and
ei_decode_fun. As a temporary solution you can also
build erl_interface with macro EI_COMPAT=21 or call
ei_set_compat_rel(21) to receive the old fallback
tuples.
---------------------------------------------------------------------
--- erts-10.4 -------------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-15535 Application(s): erts
Related Id(s): PR-2055
Do not allocate new bitstring/binary when an empty
binary is appended.
OTP-15543 Application(s): erts
Related Id(s): PR-2089
Document that process_info(_, current_function) can
return {current_function, undefined} in case of
execution of native code.
OTP-15672 Application(s): erts
Fixed bug in ets:select, ets:match and friends which
could cause the table to remain fixated (as if
ets:safe_fixtable had been called) after the call
returned. This could happen for protected tables if
another concurrent running process transfered table
ownership to the process during its ets:select/match
call. Ownership can be transfered using either
ets:give_away or the heir table option.
OTP-15693 Application(s): erts
Fixed a Windows-specific bug in file:list_dir/1 that
caused it to misbehave on network shares.
OTP-15694 Application(s): erts
Related Id(s): ERL-863
Fixed bug when calling enif_whereis_* from NIF resource
destructor. Symtoms could be emulator crash or hanging
scheduler threads.
OTP-15698 Application(s): erts
Fixed a bug in the error case of apply/3, where the
exception would erroneously have an empty argument list
in some cases.
OTP-15707 Application(s): erts, stdlib
A bug has been fixed in the maps implementation that
could cause a crash or memory usage to grow until the
machine ran out of memory. This could happen when
inserting a new key-value pair with a key K1 containing
a binary B1 into a map M having a key K2 with a binary
B2 if the following conditions were met:
-- B1 =/= B2
-- size(B1) >= 4294967296
-- size(B2) >= 4294967296
-- size(M) >= 32
-- (size(B1) rem 4294967296) == (size(B2) rem
4294967296)
-- the first (size(B1) rem 4294967296) bytes are the
same both in B1 and B2
-- substituting B1 in K1 with B2 would create a term
with the same value as K2
The root cause of the problem is that the maps
implementation only hashed the first (X rem 4294967296)
bytes of binaries so that different binaries could get
the same hash value independently of the hash seed.
OTP-15708 Application(s): erts
term_to_binary() and distributed sends will now throw a
system_limit exception instead of producing erroneous
results when trying to encode a binary larger than 4
GB.
OTP-15773 Application(s): erl_interface, erts
The vxworks configure has been updated to respect the
environment CFLAGS.
--- Improvements and New Features ---
OTP-13397 Application(s): erts
*** HIGHLIGHT ***
Add support for Erlang Distribution protocol to split
the payload of large signals into several fragments.
This allows other processes to communicate
uninterrupted during the transmission of these signals.
OTP-14831 Application(s): erts, kernel
*** HIGHLIGHT ***
A simple socket API is provided through the socket
module. This is a low level API that does *not* replace
gen_[tcp|udp|sctp]. It is intended to *eventually*
replace the inet driver, but not the high level
gen-modules (gen_tcp, gen_udp and gen_sctp). It also
provides a basic API that facilitates the
implementation of other protocols, than TCP, UDP and
SCTP.
Known issues are; No support for the Windows OS
(currently).
OTP-15011 Application(s): erts
Related Id(s): PR-2147
Added NIF functions enif_set_pid_undefined,
enif_is_pid_undefined and enif_compare_pids.
OTP-15063 Application(s): erts
Underutilized memory segments (carriers) can now move
between all allocator instances, rather than just
between instances of the same type, which greatly
reduces memory usage in some scenarios.
OTP-15075 Application(s): erts
The emulator will now mark free blocks in pooled
carriers with madvise(2) + MADV_FREE (or similar),
letting the OS reclaim the associated physical memory
if necessary.
OTP-15095 Application(s): erts
New ERL_NIF_SELECT_CANCEL feature added to enif_select
in order to cancel (or "deselect") a read or write
event on a previously selected file descriptor.
OTP-15128 Application(s): erts, stdlib
*** HIGHLIGHT ***
ETS option write_concurrency now also affects and
improves the scalability of ordered_set tables. The
implementation is based on a data structure called
contention adapting search tree, where the lock
granularity adapts to the actual amount of concurrency
exploited by the applications in runtime.
OTP-15129 Application(s): crypto, erts
Build configuration of the crypto application has been
moved from the erts application into the crypto
application.
OTP-15195 Application(s): erts
Related Id(s): PR-1812
Anonymous functions that don't capture environment are
now created at load-time instead of in run-time.
OTP-15211 Application(s): erts
Related Id(s): PR-1889
Optimize updates of maps with identical keys and
values. E.g. in the example below the original Map will
be reused as the return of the update.
1> Map = #{ a => b }. #{ a => b } 2> Map#{ a := b }.
OTP-15238 Application(s): erts
Related Id(s): PR-1803
Optimize binary:match/2 and binary:matches/2 to use
memchr internally.
OTP-15261 Application(s): erts
The runtime system used to terminate when a message
larger than 2 Gb was passed over the distribution. The
send operation will now instead throw a system_limit
exeption.
OTP-15336 Application(s): erts, sasl
Related Id(s): PR-1825
Change the first module called by erts to be names
erl_init instead of otp_ring0. systools in sasl have
been updated to reflect this change.
OTP-15340 Application(s): erl_interface, erts, megaco, odbc
Related Id(s): OTP-14625
Minor adjustments made to build system for parallel
configure.
OTP-15349 Application(s): erts
Related Id(s): PR-2084
Two new NIF interface functions enif_select_read and
enif_select_write. They are similar to existing
enif_select but allow a custom event message as
argument.
OTP-15351 Application(s): erts
Related Id(s): ERL-749
The embedded copy of zlib has been updated from 1.2.8
to 1.2.11.
Note that this copy is only used as a fallback when the
target platform doesn't provide any zlib development
libraries. If your system provides zlib then it will be
used even if it is older than 1.2.11.
OTP-15362 Application(s): erts
Related Id(s): PR-2127
New NIF function enif_make_monitor_term.
OTP-15427 Application(s): erts
Appending lists (The ++ operator) will now yield
properly on large inputs.
OTP-15439 Application(s): erts
*** HIGHLIGHT ***
The length/1 BIF used to calculate the length of the
list in one go without yielding, even if the list was
very long. In OTP 22, length/1 will yield when called
with a long lists.
OTP-15513 Application(s): erts
Related Id(s): ERL-773
Processes sending messages are now punished with a
reduction cost based on message size. That is, a
process sending a large message will yield earlier than
before.
OTP-15581 Application(s): erts
Related Id(s): OTP-15580
The transitory emulator option +ztma true (introduced
in OTP 21.3) has been removed.
OTP-15596 Application(s): erts, hipe, otp
*** HIGHLIGHT ***
In OTP 22, HiPE (the native code compiler) is not fully
functional. The reasons for this are:
There are new BEAM instructions for binary matching
that the HiPE native code compiler does not support.
The new optimizations in the Erlang compiler create new
combination of instructions that HiPE currently does
not handle correctly.
If erlc is invoked with the +native option, and if any
of the new binary matching instructions are used, the
compiler will issue a warning and produce a BEAM file
without native code.
OTP-15610 Application(s): erts
The termination behaviour of processes has changed to
allow processes to yield while sending link
exit/monitor down signals.
The erl crash dump as been expanded to now also include
processes that are termenating but have not yet
terminated.
OTP-15611 Application(s): erts, kernel
The dist messages EXIT, EXIT2 and MONITOR_DOWN have
been updated with new versions that send the reason
term as part of the payload of the message instead of
as part of the control message.
The old versions are still present and can be used when
communicating with nodes that don't support the new
versions.
OTP-15612 Application(s): erts
When sending messages, exit, exit2 and monitor down
distributed signals, the process sending will now yield
appropriately.
This means that a terminating process will yield and
possibly be suspended on busy distribution entries
while they are terminating. This means that any memory
held by such processes will not be released until after
all exit/monitor down signals have been sent.
OTP-15613 Application(s): erts
All external pids/ports/refs created by
erlang:list_to_pid/port/ref debug functions now compare
equal to any other pid/port/ref with the same number
from that node.
Before this change they compared differently because
the node creation of the pid/port/ref did not compare
equal to any real pid/port/ref creation.
This will mostly effect pids/ports/refs typed in the
shell.
OTP-15615 Application(s): erts, stdlib
The persistent_term functions put/2 and erase/1 are now
yeliding.
OTP-15617 Application(s): erts
A new erlang:dist_ctrl_set_opt(DHandle, get_size,
Value) option has been added. This option makes it
possible to configure the distribution channel
identified by DHandle so that
erlang:dist_ctrl_get_data(DHandle) also returns the
size of the data to pass over the channel.
OTP-15623 Application(s): erts, stdlib
Related Id(s): PR-2190
Previously, all ETS tables used centralized counter
variables to keep track of the number of items stored
and the amount of memory consumed. These counters can
cause scalability problems (especially on big NUMA
systems). This change adds an implementation of a
decentralized counter and modifies the implementation
of ETS so that ETS tables of type ordered_set with
write_concurrency enabled use the decentralized
counter. Experiments indicate that this change
substantially improves the scalability of ETS
ordered_set tables with write_concurrency enabled in
scenarios with frequent ets:insert/2 and ets:delete/2
calls.
OTP-15631 Application(s): erts
The iolist_size/1 function is now yielding which means
that an Erlang/OTP system will be responsive even if
the applications running on the system frequently call
iolist_size/1 with large iolists.
OTP-15635 Application(s): erts
A simple test suite for the net module has been added.
OTP-15640 Application(s): erts
*** HIGHLIGHT ***
Added the NIF function enif_term_type, which helps
avoid long sequences of enif_is_xyz by returning the
type of the given term. This is especially helpful for
NIFs that serialize terms, such as JSON encoders, where
it can improve both performance and readability.
OTP-15674 Application(s): erts
Related Id(s): PR-2177
The last call optimization is now applied to BIFs. When
calling a BIF in the tail position of a function, the
return address and stack frame will now be discarded
before calling the BIF. As consequence of this change,
the immediate caller of a tail-called BIF will no
longer be available in stack backtraces.
OTP-15703 Application(s): erts
Fix GC bug where distributed messages in a processes
mailbox would cause extra GCs. This can be very
expensive if there many messages in the mailbox.
OTP-15715 Application(s): compiler, erts
*** HIGHLIGHT ***
Internal documentation has now been added to the *Erts*
and *Compiler* applications.
The internal documents for *Erts* describe
miscellaneous interesting implementation details. Those
details can change at any time.
The internal documentation for *Compiler* documents the
API for the Core Erlang modules. While we will not
change those APIs without good reason, we don't give
the same guarantees about backward compatibility as for
the rest of the APIs in OTP.
OTP-15740 Application(s): erts
The performance of non-bignum integer arithmetic has
been improved.
Full runtime dependencies of erts-10.4: kernel-6.1, sasl-3.3,
stdlib-3.5
---------------------------------------------------------------------
--- hipe-3.19 -------------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-15385 Application(s): hipe
Related Id(s): PR-1986
Add function hipe:erllvm_is_supported to check presence
of suitable version of the LLVM tool chain as well as
supported hardware architecture. The old
hipe:llvm_support_available has been removed.
OTP-15386 Application(s): hipe
Related Id(s): PR-1963
Fix hipe LLVM for FreeBSD and other non-linux unix to
use /tmp/ instead of /dev/shm/.
--- Improvements and New Features ---
OTP-15596 Application(s): erts, hipe, otp
*** HIGHLIGHT ***
In OTP 22, HiPE (the native code compiler) is not fully
functional. The reasons for this are:
There are new BEAM instructions for binary matching
that the HiPE native code compiler does not support.
The new optimizations in the Erlang compiler create new
combination of instructions that HiPE currently does
not handle correctly.
If erlc is invoked with the +native option, and if any
of the new binary matching instructions are used, the
compiler will issue a warning and produce a BEAM file
without native code.
Full runtime dependencies of hipe-3.19: compiler-5.0, erts-9.3,
kernel-5.3, stdlib-3.4, syntax_tools-1.6.14
---------------------------------------------------------------------
--- inets-7.0.8 -----------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14282 Application(s): asn1, common_test, debugger, dialyzer,
erl_docgen, inets, jinterface, observer, otp,
syntax_tools, wx
Related Id(s): PR-1891
All incorrect (that is, all) uses of "can not" has been
corrected to "cannot" in source code comments,
documentation, examples, and so on.
Full runtime dependencies of inets-7.0.8: erts-6.0, kernel-3.0,
mnesia-4.12, runtime_tools-1.8.14, ssl-5.3.4, stdlib-3.5
---------------------------------------------------------------------
--- jinterface-1.10 -------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14282 Application(s): asn1, common_test, debugger, dialyzer,
erl_docgen, inets, jinterface, observer, otp,
syntax_tools, wx
Related Id(s): PR-1891
All incorrect (that is, all) uses of "can not" has been
corrected to "cannot" in source code comments,
documentation, examples, and so on.
--- Improvements and New Features ---
OTP-15774 Application(s): jinterface
Related Id(s): OTP-15712
*** POTENTIAL INCOMPATIBILITY ***
Added support to receive export funs (fun M:F/A).
Before this change, export funs sent to a jinterface
node were encoded using an undocumented fallback tuple
format {M,F}. Existing jinterface implementations
expecting these tuples must be changed to instead use
the existing OtpErlangExternalFun class.
---------------------------------------------------------------------
--- kernel-6.4 ------------------------------------------------------
---------------------------------------------------------------------
--- Improvements and New Features ---
OTP-14831 Application(s): erts, kernel
*** HIGHLIGHT ***
A simple socket API is provided through the socket
module. This is a low level API that does *not* replace
gen_[tcp|udp|sctp]. It is intended to *eventually*
replace the inet driver, but not the high level
gen-modules (gen_tcp, gen_udp and gen_sctp). It also
provides a basic API that facilitates the
implementation of other protocols, than TCP, UDP and
SCTP.
Known issues are; No support for the Windows OS
(currently).
OTP-15491 Application(s): kernel
Related Id(s): com/erlang/otp/pull/2019, https://github
Improved the documentation for the linger option.
OTP-15607 Application(s): kernel
Related Id(s): ERIERL-280
Global no longer tries more than once when connecting
to other nodes.
OTP-15611 Application(s): erts, kernel
The dist messages EXIT, EXIT2 and MONITOR_DOWN have
been updated with new versions that send the reason
term as part of the payload of the message instead of
as part of the control message.
The old versions are still present and can be used when
communicating with nodes that don't support the new
versions.
OTP-15668 Application(s): kernel
Related Id(s): PR-2088
Kernel configuration parameter start_distribution =
boolean() is added. If set to false, the system is
started with all distribution functionality disabled.
Defaults to true.
OTP-15692 Application(s): kernel
Related Id(s): PR-2170
*** POTENTIAL INCOMPATIBILITY ***
In OTP-21.3, a warning was introduced for duplicated
applications/keys in configuration. This warning would
be displayed both when the configuration was given as a
file on system start, and during runtime via
application:set_env/1,2.
The warning is now changed to a badarg exception in
application:set_env/1,2. If the faulty configuration is
given in a configuration file on system start, the
startup will fail.
Full runtime dependencies of kernel-6.4: erts-10.2.5, sasl-3.0,
stdlib-3.5
---------------------------------------------------------------------
--- megaco-3.18.5 ---------------------------------------------------
---------------------------------------------------------------------
--- Improvements and New Features ---
OTP-15262 Application(s): megaco, runtime_tools
Related Id(s): OTP-15129
Minor updates to build system necessary due to move of
configuration of crypto application.
OTP-15340 Application(s): erl_interface, erts, megaco, odbc
Related Id(s): OTP-14625
Minor adjustments made to build system for parallel
configure.
Full runtime dependencies of megaco-3.18.5: asn1-3.0, debugger-4.0,
erts-7.0, et-1.5, kernel-3.0, runtime_tools-1.8.14, stdlib-2.5
---------------------------------------------------------------------
--- mnesia-4.16 -----------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-15550 Application(s): mnesia
Related Id(s): PR-12029
Optimize mnesia:read/1 if data have been written in the
same transaction.
OTP-15689 Application(s): mnesia
Related Id(s): ERL-556, PR-1695
Fixed bugs in table index plugin handling.
--- Improvements and New Features ---
OTP-15588 Application(s): mnesia
Related Id(s): PR-2102
Optimized dumping of tables with plugin backends.
Full runtime dependencies of mnesia-4.16: erts-9.0, kernel-5.3,
stdlib-3.4
---------------------------------------------------------------------
--- observer-2.9.1 --------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14282 Application(s): asn1, common_test, debugger, dialyzer,
erl_docgen, inets, jinterface, observer, otp,
syntax_tools, wx
Related Id(s): PR-1891
All incorrect (that is, all) uses of "can not" has been
corrected to "cannot" in source code comments,
documentation, examples, and so on.
Full runtime dependencies of observer-2.9.1: erts-7.0, et-1.5,
kernel-3.0, runtime_tools-1.8.14, stdlib-3.5, wx-1.2
---------------------------------------------------------------------
--- odbc-2.12.4 -----------------------------------------------------
---------------------------------------------------------------------
--- Improvements and New Features ---
OTP-15340 Application(s): erl_interface, erts, megaco, odbc
Related Id(s): OTP-14625
Minor adjustments made to build system for parallel
configure.
Full runtime dependencies of odbc-2.12.4: erts-6.0, kernel-3.0,
stdlib-2.0
---------------------------------------------------------------------
--- os_mon-2.5 ------------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-15770 Application(s): os_mon
Related Id(s): PR-2208
Fix typespec of cpu_sup:util().
--- Improvements and New Features ---
OTP-14984 Application(s): os_mon, snmp
Related Id(s): OTP-15329
The application otp_mibs has been removed from OTP.
Some of its components (mibs) have been moved to other
apps (snmp), or removed completely (os_mon).
Full runtime dependencies of os_mon-2.5: erts-6.0, kernel-3.0,
sasl-2.4, stdlib-2.0
---------------------------------------------------------------------
--- public_key-1.6.6 ------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-15754 Application(s): public_key
Related Id(s): ERL-878
RSA options passed to crypto for encrypt and decrypt
with public or private key.
OTP-15776 Application(s): public_key
Fix dialyzer warnings caused by a faulty type
specification for digest_type().
This change updates digest_type() and the functions
operating with this argument type to accept both 'sha1'
and 'sha' as digest_type().
--- Improvements and New Features ---
OTP-13726 Application(s): public_key
Add possibility to read PEM files encrypted with old
PEM encryption using AES-256
OTP-15687 Application(s): public_key
Related Id(s): PR-2162
Relax decoding of certificates to so that "harmless"
third party encoding errors may be accepted but not
created by the public_key application. This adds
acceptance of using an incorrect three character
country code, the PKIX standard use two character
country codes. It is also accepted that the country
code is utf8 encoded but the specification says it
should be ASCII.
Full runtime dependencies of public_key-1.6.6: asn1-3.0, crypto-3.8,
erts-6.0, kernel-3.0, stdlib-3.5
---------------------------------------------------------------------
--- reltool-0.8 -----------------------------------------------------
---------------------------------------------------------------------
--- Improvements and New Features ---
OTP-15571 Application(s): reltool
*** POTENTIAL INCOMPATIBILITY ***
A new element, Opts, can now be included in a rel tuple
in the reltool release specific configuration format:
{rel, Name, Vsn, RelApps, Opts}.
This supports the use of {rel, Name, Vsn, RelApps,
[{load_dot_erlang, false}]} to prevent the boot script
from running the .erlang file.
The incompatibilities are as follows:
* The return from reltool:get_config/1 and
reltool:get_config/3 includes the new rel tuple for all
rels where the load_dot_erlang option is set to false.
* The return from reltool:get_config/3 includes the new
rel tuple for ALL rels if the InclDefs parameter is set
to true.
Full runtime dependencies of reltool-0.8: erts-7.0, kernel-3.0,
sasl-2.4, stdlib-3.4, tools-2.6.14, wx-1.2
---------------------------------------------------------------------
--- runtime_tools-1.13.3 --------------------------------------------
---------------------------------------------------------------------
--- Improvements and New Features ---
OTP-15262 Application(s): megaco, runtime_tools
Related Id(s): OTP-15129
Minor updates to build system necessary due to move of
configuration of crypto application.
Full runtime dependencies of runtime_tools-1.13.3: erts-8.0,
kernel-5.0, mnesia-4.12, stdlib-3.0
---------------------------------------------------------------------
--- sasl-3.4 --------------------------------------------------------
---------------------------------------------------------------------
--- Improvements and New Features ---
OTP-15336 Application(s): erts, sasl
Related Id(s): PR-1825
Change the first module called by erts to be names
erl_init instead of otp_ring0. systools in sasl have
been updated to reflect this change.
Full runtime dependencies of sasl-3.4: erts-10.2, kernel-5.3,
stdlib-3.4, tools-2.6.14
---------------------------------------------------------------------
--- snmp-5.3 --------------------------------------------------------
---------------------------------------------------------------------
--- Improvements and New Features ---
OTP-14984 Application(s): os_mon, snmp
Related Id(s): OTP-15329
The application otp_mibs has been removed from OTP.
Some of its components (mibs) have been moved to other
apps (snmp), or removed completely (os_mon).
OTP-15691 Application(s): snmp
Related Id(s): ERIERL-324
*** HIGHLIGHT ***
[snmp|agent] Add a get-mechanism callback module (and a
corresponding behaviour). The agent calls this module
to handle each get (get, get-next and get-bulk)
request.
Full runtime dependencies of snmp-5.3: crypto-3.3, erts-6.0,
kernel-3.0, mnesia-4.12, runtime_tools-1.8.14, stdlib-2.5
---------------------------------------------------------------------
--- ssh-4.7.6 -------------------------------------------------------
---------------------------------------------------------------------
--- Improvements and New Features ---
OTP-15673 Application(s): ssh
SSH uses the new crypto API.
Full runtime dependencies of ssh-4.7.6: crypto-4.2, erts-6.0,
kernel-3.0, public_key-1.5.2, stdlib-3.3
---------------------------------------------------------------------
--- ssl-9.3 ---------------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14792 Application(s): ssl
The distribution handshake with TLS distribution
(inet_tls_dist) does now utilize the socket option
{nodelay, true}, which decreases the distribution setup
time significantly.
OTP-15710 Application(s): ssl
Related Id(s): ERL-893
Correct shutdown reason to avoid an incorrect crash
report
OTP-15746 Application(s): ssl
Related Id(s): ERIERL-333
Enhance documentation and type specifications.
--- Improvements and New Features ---
OTP-14865 Application(s): ssl
*** POTENTIAL INCOMPATIBILITY ***
TLS-1.0, TLS-1.1 and DTLS-1.0 are now considered legacy
and not supported by default
OTP-15055 Application(s): ssl
*** HIGHLIGHT ***
Use new logger API in ssl. Introduce log levels and
verbose debug logging for SSL.
OTP-15591 Application(s): ssl
*** HIGHLIGHT ***
Basic support for TLS 1.3 Server for experimental use.
The client is not yet functional, for more information
see the Standards Compliance chapter of the User's
Guide.
OTP-15626 Application(s): ssl
Add support for PSK CCM ciphers from RFC 6655
Full runtime dependencies of ssl-9.3: crypto-4.2, erts-10.0,
inets-5.10.7, kernel-6.0, public_key-1.5, stdlib-3.5
---------------------------------------------------------------------
--- stdlib-3.9 ------------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-15649 Application(s): stdlib
Fix a bug in string:lexemes/2.
The bug was found when optimizing the handling of deep
lists of Unicode characters in the string module.
OTP-15707 Application(s): erts, stdlib
A bug has been fixed in the maps implementation that
could cause a crash or memory usage to grow until the
machine ran out of memory. This could happen when
inserting a new key-value pair with a key K1 containing
a binary B1 into a map M having a key K2 with a binary
B2 if the following conditions were met:
-- B1 =/= B2
-- size(B1) >= 4294967296
-- size(B2) >= 4294967296
-- size(M) >= 32
-- (size(B1) rem 4294967296) == (size(B2) rem
4294967296)
-- the first (size(B1) rem 4294967296) bytes are the
same both in B1 and B2
-- substituting B1 in K1 with B2 would create a term
with the same value as K2
The root cause of the problem is that the maps
implementation only hashed the first (X rem 4294967296)
bytes of binaries so that different binaries could get
the same hash value independently of the hash seed.
OTP-15751 Application(s): stdlib
Since the introduction of the stack trace variable, the
Erlang Pretty Printer has left out the exception class
throw even when the stack trace variable cannot be left
out, which is not correct Erlang code. The fix is to
always include the exception class throw.
OTP-15760 Application(s): compiler, stdlib
Related Id(s): ERL-907
record_info/2 is a pseudo-function that requires
literal arguments known at compile time. Therefore, the
following usage is illegal: fun record/info/2. The
compiler would crash when during compilation of that
kind of code. Corrected to issue a compilation error.
--- Improvements and New Features ---
OTP-14461 Application(s): crypto, stdlib
Related Id(s): PR-1857
A new rand module algorithm, exro928ss
(Xoroshiro928**), has been implemented. It has got a
really long period and good statistical quality for all
output bits, while still being only about 50% slower
than the default algorithm.
The same generator is also used as a long period
counter in a new crypto plugin for the rand module,
algorithm crypto_aes. This plugin uses AES-256 to
scramble the counter which buries any detectable
statistical artifacts. Scrambling is done in chunks
which are cached to get good amortized speed (about
half of the default algorithm).
OTP-14724 Application(s): stdlib
Related Id(s): PR-2056
Types related to server naming and starting have been
exported from gen_statem. These are: server_name/0,
server_ref/0, start_opt/0, start_ret/0 and
enter_loop_opt/0.
OTP-14731 Application(s): stdlib
Related Id(s): PR-1969
The default algorithm for the rand module has been
changed to exsss (Xorshift116**) which is a combination
of the Xorshift116 (exsp) state update and a new
scrambler "StarStar" from the 2018 paper "Scrambled
Linear Pseudorandom Number Generators" by David
Blackman and Sebastiano Vigna. This combination should
not have the caveat of weak low bits that the previous
default algorithm(s) have had, with the cost of about
10% lower speed. See GitHub pull request #1969.
OTP-14737 Application(s): stdlib
Related Id(s): PR-1855
The generic state machine behaviour gen_statem has
gotten code cleanup and documentation improvements from
GitHub Pull Request #1855, even though the PR itself
was rejected.
OTP-15111 Application(s): stdlib
Update Unicode specification to version 11.0.
OTP-15128 Application(s): erts, stdlib
*** HIGHLIGHT ***
ETS option write_concurrency now also affects and
improves the scalability of ordered_set tables. The
implementation is based on a data structure called
contention adapting search tree, where the lock
granularity adapts to the actual amount of concurrency
exploited by the applications in runtime.
OTP-15200 Application(s): stdlib
Related Id(s): PR-1878
Optimized maps:new/0 with trivial Erlang
implementation, making use of literal terms (the empty
map) not needing dynamic heap allocation.
OTP-15381 Application(s): stdlib
*** POTENTIAL INCOMPATIBILITY ***
The gen_* behaviours have been changed so that if
logging of the last N messages through sys:log/2,3 is
active for the server, this log is included in the
terminate report.
To accomplish this the format of "System Events" as
defined in the man page for sys has been clarified and
cleaned up, a new function sys:get_log/1 has been
added, and sys:get_debug/3 has been deprecated. Due to
these changes, code that relies on the internal badly
documented format of "System Events", need to be
corrected.
OTP-15452 Application(s): stdlib
The gen_statem behaviour engine loop has been optimized
for better performance in particular when the callback
module returns some actions, that is better performance
for more realistic applications than the Echo
Benchmark.
OTP-15615 Application(s): erts, stdlib
The persistent_term functions put/2 and erase/1 are now
yeliding.
OTP-15623 Application(s): erts, stdlib
Related Id(s): PR-2190
Previously, all ETS tables used centralized counter
variables to keep track of the number of items stored
and the amount of memory consumed. These counters can
cause scalability problems (especially on big NUMA
systems). This change adds an implementation of a
decentralized counter and modifies the implementation
of ETS so that ETS tables of type ordered_set with
write_concurrency enabled use the decentralized
counter. Experiments indicate that this change
substantially improves the scalability of ETS
ordered_set tables with write_concurrency enabled in
scenarios with frequent ets:insert/2 and ets:delete/2
calls.
OTP-15633 Application(s): common_test, stdlib
Related Id(s): PR-1787
Use ssh instead of rsh as the default remote shell.
OTP-15680 Application(s): stdlib
Related Id(s): PR-2114
Added beam_lib:strip/2 and friends, which accept a list
of chunks that should be preserved when stripping.
OTP-15749 Application(s): compiler, stdlib
Related Id(s): ERL-904
There are new compiler options nowarn_removed and
{nowarn_removed,Items} to suppress warnings for
functions and modules that have been removed from OTP.
OTP-15755 Application(s): stdlib
Let the Erlang Pretty Printer put atomic parts on the
same line.
OTP-15756 Application(s): stdlib
Add option quote_singleton_atom_types to the Erlang
Pretty Printer's functions. Setting the option to true
adds quotes to all singleton atom types.
Full runtime dependencies of stdlib-3.9: compiler-5.0, crypto-3.3,
erts-10.4, kernel-6.0, sasl-3.0
---------------------------------------------------------------------
--- syntax_tools-2.2 ------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14282 Application(s): asn1, common_test, debugger, dialyzer,
erl_docgen, inets, jinterface, observer, otp,
syntax_tools, wx
Related Id(s): PR-1891
All incorrect (that is, all) uses of "can not" has been
corrected to "cannot" in source code comments,
documentation, examples, and so on.
--- Improvements and New Features ---
OTP-15761 Application(s): edoc, syntax_tools
Correct links in the documentation.
Full runtime dependencies of syntax_tools-2.2: compiler-7.0,
erts-9.0, kernel-5.0, stdlib-3.4
---------------------------------------------------------------------
--- tools-3.2 -------------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-15534 Application(s): tools
Related Id(s): PR-2078
Add cprof and tags modules to .app file so that they
are included in releases.
OTP-15699 Application(s): tools
Related Id(s): PR-2184
Improved documentation parsing in emacs erldoc
functionality.
--- Improvements and New Features ---
OTP-15575 Application(s): tools
*** HIGHLIGHT ***
The cover tool now uses the counters module instead of
ets for updating the counters for how many times a line
has been executed. By default, Cover will work with
distributed nodes, but a new function
cover:local_only/0 allows running the Cover in a
restricted but faster local-only mode.
The increase in speed will vary depending on the type
of code being cover-compiled, but as an example, the
compiler test suite runs more than twice as fast with
the new Cover.
Full runtime dependencies of tools-3.2: compiler-5.0, erts-9.1,
kernel-5.4, runtime_tools-1.8.14, stdlib-3.4
---------------------------------------------------------------------
--- wx-1.8.8 --------------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14282 Application(s): asn1, common_test, debugger, dialyzer,
erl_docgen, inets, jinterface, observer, otp,
syntax_tools, wx
Related Id(s): PR-1891
All incorrect (that is, all) uses of "can not" has been
corrected to "cannot" in source code comments,
documentation, examples, and so on.
Full runtime dependencies of wx-1.8.8: erts-6.0, kernel-3.0,
stdlib-2.0
---------------------------------------------------------------------
--- xmerl-1.3.21 ----------------------------------------------------
---------------------------------------------------------------------
--- Fixed Bugs and Malfunctions ---
OTP-14703 Application(s): xmerl
Related Id(s): PR-1964
A typo in an error printout has been fixed.
Full runtime dependencies of xmerl-1.3.21: erts-6.0, kernel-3.0,
stdlib-2.5
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